UDA1341TS/N1 Просмотр технического описания (PDF) - Philips Electronics

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UDA1341TS/N1

Economy audio CODEC for MiniDisc (MD) home stereo and portable applications

Philips Electronics 

Philips Semiconductors

Economy audio CODEC for MiniDisc (MD)

home stereo and portable applications

Preliminary specification

UDA1341TS

7.21.3 DATA0 EXTENDED PROGRAMMING REGISTERS

Table 25 Extended control registers

EA2 EA1 EA0 ED4 ED3 ED2 ED1 ED0

REGISTER SELECTED

0 0 0 MA4 MA3 MA2 MA1 MA0 MA = mixer gain channel 1 (5 bits)

0 0 1 MB4 MB3 MB2 MB1 MB0 MB = mixer gain channel 2 (5 bits)

0 1 0 MS2 MS1 MS0 MM1 MM0 MS = MIC sensitivity (3 bits)

MM = mixer mode (2 bits)

1 0 0 AG 0 0 IG1 IG0 AG = AGC control

IG = input amplifier gain channel 2 (2 bits)

1 0 1 IG6 IG5 IG4 IG3 IG2 IG = input amplifier gain channel 2 (5 bits)

1 1 0 AT2 AT1 AT0 AL1 AL0 AT = AGC time constant (3 bits)

AL = AGC output level (2 bits)

Programming via extended addressing is done by first

sending a DATA0 data byte EA (3 bits) which specifies the

addresses of the extended register followed by a DATA0

data byte which specifies the contents of the extended

data register (5 bits). The EA extended addresses and

names of the extended data registers are given in

Table 25.

7.21.3.1 Mixer gain control

Two 5-bit values to program the channel 1 (MA) and

channel 2 (MB) coefficients in the mixer mode. The range

is from 0 to −∞ dB in steps of 1.5 dB. The default settings

are given in Table 5.

Table 26 Mixer gain control channel 1 and channel 2

settings

MA4 MA3 MA2 MA1 MA0

MB4 MB3 MB2 MB1 MB0

00000

00001

00010

:

:

:

:

:

11101

11110

11111

MIXER GAIN

(dB)

0

−1.5

−3.0

:

−43.5

−45.0

−∞

7.21.3.2 MIC sensitivity

A 3-bit value to program eight gain settings of the

microphone amplifier. These settings are valid only when

AGC control is enabled and not in the double differential

mode. The default setting is given in Table 5.

Table 27 MIC sensitivity settings

MS2 MS1 MS0

000

001

010

011

100

101

110

111

MIC AMPLIFIER GAIN

(dB)

−3

0

+3

+9

+15

+21

+27

not used

1998 Dec 18

18

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